{"title":"Constructing rational pore in nanocarbons by chemical and physical co-activation of polyaniline for high performance electrical double layer capacitors","authors":"Zhenhu Li , Yu Zeng , Shuangyi Liu","doi":"10.1016/j.mtsust.2024.101060","DOIUrl":"10.1016/j.mtsust.2024.101060","url":null,"abstract":"<div><div>Rationalizing pore structure of carbon electrode materials is an effective strategy to improve electrochemical performance of electrical double layer capacitors (EDLCs). Herein, chemical-physical co-activation method is developed to prepare polyaniline-derived N-doped porous nanocarbon with useable micropore and small mesopore for guaranteeing high electrostatically adsorptive area and fast ion transport, respectively. K<sub>2</sub>CO<sub>3</sub> firstly pre-activates to create appropriate pores, following by CO<sub>2</sub> deep activation for pore development. The resulting coral-like nitrogen-doped porous carbon (NPC<sub>KC</sub>) exhibits stable nitrogen-doping, largely efficient surface area, reasonable pore configuration (0.7–3 nm), which are highly desirable for capacitive behaviors. When conducted in aqueous electrolyte, NPC<sub>KC</sub> electrode displays a specific capacitance up to 236 F g<sup>−1</sup> at 0.5 A g<sup>−1</sup> and conspicuous cyclic stability of 96.9 % retention after 10,000 cycles. More meaningful, the organic NPC<sub>KC</sub>-based EDLC reaches a 132 F g<sup>−1</sup> specific capacitance at 0.2 A g<sup>−1</sup> and maintain 120 F g<sup>−1</sup> even at 10 A g<sup>−1</sup> (90.9 % capacitance retention), greatly surpassing that of commercial AC with similar specific surface area, which exclusively clarifies the significant influence of small mesopores on EDLC energy storage. Meanwhile, it possesses high density energy (40.7 W h kg<sup>−1</sup> at 149.6 W kg<sup>−1</sup>) and power density (23.5 W h kg<sup>−1</sup> at 6020 W kg<sup>−1</sup>), as well as excellent cyclic stability (89.4% of initial capacitance after 10,000 cycles), holding great practical potentials to application in commercial EDLCs.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101060"},"PeriodicalIF":7.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Elucidating the synergy of layer-by-layer TMDC-TMN deposition for superior electrochemical performance in supercapattery devices","authors":"Muhammad Zahir Iqbal , Ayesha Zakir , Maira Javed , Nacer Badi , Rashid Ali , H.H. Hegazy , A.A. Alahmari","doi":"10.1016/j.mtsust.2024.101063","DOIUrl":"10.1016/j.mtsust.2024.101063","url":null,"abstract":"<div><div>Supercapatteric devices can combine the advantages of batteries and supercapacitors, addressing their individual limitations in power and energy density. This study focuses on enhancing the electrochemical performance of battery-grade electrodes through the strategic incorporation of transition metal dichalcogenides and transition metal nitrides, specifically tungsten disulfide. Utilizing the magnetron sputtering, we integrated conductive layers of chromium nitride and titanium nitride between substrate and WS<sub>2</sub>. Results of thorough electrochemical testing revealed that the initial specific capacity (Q<sub>s</sub>) of WS<sub>2</sub> was 600 C/g. However, by incorporating interfacial layers of CrN and TiN, the Q<sub>s</sub> was significantly improved 830 C/g and 1230 C/g, demonstrating the substantial impact of interface engineering on overall performance of WS<sub>2</sub>. The fabricated supercapatteric devices, demonstrated exceptional performance, with WS<sub>2</sub>/CrN//AC achieving Q<sub>s</sub> of 950 C/g and WS<sub>2</sub>/TiN//AC reaching a Q<sub>s</sub> of 1100 C/g. Moreover, WS<sub>2</sub>/CrN//AC and WS<sub>2</sub>/TiN//AC attained power densities of 6800 W/kg (with 99.8 % capacity retention) and 7108 W/kg (with 99.9 % capacity retention), respectively, and energy densities of 98 Wh/kg and 135 Wh/kg, highlighting the superior performance and stability of WS<sub>2</sub>/TiN//AC. Additionally, for examining the diffusive and capacitive behaviors of devices, two different semi-empirical models were further used and compared. This work emphasizes the potential of interface engineering in enhancing the performance of hybrid energy storage (HES) systems.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101063"},"PeriodicalIF":7.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Samson O. Oselusi , Nicole R.S. Sibuyi , Mervin Meyer , Samantha Meyer , Abram M. Madiehe
{"title":"Phytofabrication of silver nanoparticles using Ehretia rigida leaf aqueous extract, their characterization, antioxidant and antimicrobial activities","authors":"Samson O. Oselusi , Nicole R.S. Sibuyi , Mervin Meyer , Samantha Meyer , Abram M. Madiehe","doi":"10.1016/j.mtsust.2024.101059","DOIUrl":"10.1016/j.mtsust.2024.101059","url":null,"abstract":"<div><div>The green synthesis of nanoparticles (NPs) offers a sustainable, rapid, and cost-effective alternative to traditional chemical and physical methods, with diverse applications across various fields. This study reports the synthesis of silver nanoparticles (AgNPs) using <em>Ehretia rigida</em> (Er) leaf aqueous extract and evaluates their biological activities. The formation of the NPs was confirmed by the change in colour from clear to dark brown. The synthesis parameters, such as pH, temperature, Er extract and silver nitrate (AgNO<sub>3</sub>) concentrations, reaction ratio, and incubation time, were optimized for high yields, controlled size, and stability of the NPs. The optimized Er-AgNPs were characterized using ultraviolet–visible (UV–vis) spectroscopy, dynamic light scattering (DLS), Fourier transform infrared (FTIR) spectroscopy, and high-resolution transmission electron microscopy (HR–TEM). The Er-AgNPs sample presented a characteristic absorbance peak at 408 nm, a hydrodynamic size of 74.02 ± 0.19 nm, a polydispersity index (PDI) of 0.39 ± 0.05, and a zeta potential of −25.4 ± 6.26 mV. FTIR analysis revealed the nature of the biomolecules responsible for the reduction and stabilization of the NPs. HR–TEM revealed that the Er-AgNPs were spherical, with core sizes ranging from 6 to 18 nm. The Er leaf aqueous extract and Er-AgNPs possessed antioxidant activities, with the Er leaf extract having higher activity than Er-AgNPs. The Er leaf extract did not exhibit any antimicrobial activity, whereas the Er-AgNPs demonstrated broad-spectrum antimicrobial activities against all the tested pathogens. This study provides a sustainable, easy and cost-effective method to produce AgNPs for biomedical applications.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101059"},"PeriodicalIF":7.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Megha Maria Stanley , Balasubramanian Sriram , Sea-Fue Wang , Abhikha Sherlin V , Sakthivel Kogularasu , Mary George
{"title":"Preserving food quality: Electrochemical detection of synthetic food antioxidant, propyl gallate in processed foods using ternary component layered double hydroxide/graphene aerogel synergy","authors":"Megha Maria Stanley , Balasubramanian Sriram , Sea-Fue Wang , Abhikha Sherlin V , Sakthivel Kogularasu , Mary George","doi":"10.1016/j.mtsust.2024.101061","DOIUrl":"10.1016/j.mtsust.2024.101061","url":null,"abstract":"<div><div>Fueled by the mounting demand from convenience-oriented consumers, the contemporary food industry increasingly relies on specialty chemicals to extend the shelf-life of processed food. Antioxidants such as propyl gallate (PG) are added to food products to avert lipid oxidation. Existing methods for monitoring PG often lack the required sensitivity and accuracy for real-time applications. Our work demonstrates enhanced sensitivity and selectivity through the synergistic combination of transition metal-based ternary layered double hydroxide (LDH) and graphene aerogel (GA) coated on a disposable screen-printed carbon electrode (SPCE). Introducing multi-metal-based LDH improves the electrochemical stability compared to virgin LDH structures. Using NiFeCu-LDH anchored to porous GA leading to high specific surface area and enhanced electron transfer, we explore the electrochemical conversion of PG at the modified SPCE using various electrochemical techniques. Differential pulse voltammetry showed a wide linear range from 0.02 to 279.1 μM and a limit of detection of 0.004 μM. Importantly, our work chronicles new insights into using Deep Eutectic Solvent (DES) systems for the green synthesis of LDHs. The developed electrochemical sensor was successfully used to assay PG in real food matrices, achieving recoveries of ±97.60–99.2%.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101061"},"PeriodicalIF":7.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Serin Jung , Kyung Suh Kim , Geon Hyeong Park , Hyun Gil Cha , Hanseob Jeong , Myung Jong Kang
{"title":"Strategies on utilizing biomass derived 5-hydroxymethylfufural by catalytic reactions: Pathways and mechanisms","authors":"Serin Jung , Kyung Suh Kim , Geon Hyeong Park , Hyun Gil Cha , Hanseob Jeong , Myung Jong Kang","doi":"10.1016/j.mtsust.2024.101058","DOIUrl":"10.1016/j.mtsust.2024.101058","url":null,"abstract":"<div><div>Biomass refinery, produces chemicals that can replace pristine petroleum-derived chemicals through chemical/biological engineering processes, and is regarded as a renewable energy source for achieving environmental-friendly production and sustainability. Among various kinds of biomass derived chemicals, 5-hydroxymethylfufural (5-HMF), produced by the dehydration of fructose via glucose isomerization, has remarkable potential as a platform chemical for utilization in value-added products such as pharmaceutical, bio plastics, bio fuels and polyesters. Representative chemicals produced from 5-HMF are 2,5-diformylfuran and 2,5-furandicarboxylic acid, which are generated via oxidation reactions, and 2,5-bis(hydroxymethyl)furan which are generated via a reduction reaction. Theses oxidation/reduction products can potentially be used as value-added chemicals for polymer vitrimers, and in bioplastic monomers for replacing pristine polyethylene terephthalate, polyurethane and polyesters. Herein, the recent achievements in the catalytic conversion of 5-HMF to oxidation/reduction products using heterogeneous catalysts and electrocatalysts are presented, including the detailed catalytic mechanisms of 5-HMF valorization. The current challenges and future perspectives are discussed to prompt further studies and catalyst design for the oxidation/reduction of 5-HMF to useful chemicals.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101058"},"PeriodicalIF":7.1,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of electrochemical features of a novel Ni2P2O7-Polyaniline nanohybrid as electroactive material in high-reliable supercapacitors","authors":"Harish Chevulamaddi, Venkateswara Rao Kalagadda","doi":"10.1016/j.mtsust.2024.101054","DOIUrl":"10.1016/j.mtsust.2024.101054","url":null,"abstract":"<div><div>A novel nanohybrid of Ni<sub>2</sub>P<sub>2</sub>O<sub>7</sub>-Polyanaline (NPP) has been engineered to study energy storage performance. The nanohybrid was fabricated by surface coating of Ni<sub>2</sub>P<sub>2</sub>O<sub>7</sub> layered nanostructure (NPL) with the conductive polymer polyaniline (PANI). Initially, pristine Ni<sub>2</sub>P<sub>2</sub>O<sub>7</sub> layered nanostructure (NPL) was synthesized through single-step hydrothermal approach. Subsequently, hybrid composite (NPP) was constructed using in-situ oxidative polymerization of aniline monomer. The structural, morphological, and compositional properties of synthesized samples were characterized via XRD, FTIR, SEM, TEM, XPS and BET analysis. The electrochemical performances of the materials were evaluated for supercapacitor performance using Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD) test, Electrochemical Impedance analysis (EIS), and cyclic stability assessments. The results demonstrated that the hybrid composite exhibited significantly enhanced capacitance of 1333.9 F/g at 1 mV/s, 1150 F/g at 1 A/g from CV and GCD measurements respectively, including impressive stability performance, retaining 95% of its capacitance over 7000 CV cycles. Furthermore, symmetrical supercapacitor device constructed using NPP electrodes and operated at potential window of 1.6 V. The assembled symmetric device demonstrated superior energy density, power density, and cycling performance. The improvements in the performance of the three and two-electrode systems are attributed to PANI coating on the NPL surface, indicating that the hybrid composite is promising candidate for highly reliable supercapacitors.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101054"},"PeriodicalIF":7.1,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Benjamin A. Jackson , Evangelos Miliordos , Mal-Soon Lee
{"title":"Theoretical prediction of materials with diffuse electrons with possible applications in redox catalysis and quantum computing","authors":"Benjamin A. Jackson , Evangelos Miliordos , Mal-Soon Lee","doi":"10.1016/j.mtsust.2024.101052","DOIUrl":"10.1016/j.mtsust.2024.101052","url":null,"abstract":"<div><div>The spin of diffuse electrons has been proposed in the literature as qubit for quantum hardware applications. Here we provide the first investigation of the thermal stability for a newly reported family of materials with diffuse electrons. This material has a diamond-like grid of Li <sup>+</sup> centers bridged by diamine chains NH<sub>2</sub>(CH<sub>2</sub>)<sub><em>n</em></sub>H<sub>2</sub>N of varying carbon length. The tetracoordinated lithium-amine center is surrounded by one diffuse electron solvated by the N–H bonds. Previous work has demonstrated the tunability of the electronic structure of this material, with short chain lengths producing a metallic material and longer a semiconductor. Density functional theory-based <em>ab initio</em> molecular dynamics simulations are employed to characterize the thermal stability and melting point of the crystalline material. Calculations show that the thermal stability ranges from 100 to 220 K, primarily depending on the carbon chain length, with longer chains increasing the stability. Melting of the material is characterized by dissociation of the diamine coordination and formation of disordered clumps of undercoordinated Li-diamine centers. These melting points are well above temperatures used in typical quantum computing applications. The computational study provides insight into avenues for the future development of similar materials and the improvement of their stability.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101052"},"PeriodicalIF":7.1,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recent advances in MOF-based composites for the detection and adsorptive removal of Pb(II) ions in aqueous phase","authors":"Kushal Arya , Ajay Kumar , Ramesh Kataria","doi":"10.1016/j.mtsust.2024.101057","DOIUrl":"10.1016/j.mtsust.2024.101057","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs) and their composites offer promising solutions for the detection and adsorption of lead (Pb<sup>2+</sup>) ions, posing health risks associated with lead contamination in water. With tunable porosity, high surface area, and inherent fluorescence, MOFs can selectively detect and remove Pb<sup>2+</sup> ions across various environmental conditions. This article describes the key strategies for designing MOFs with optimal adsorption properties and integrating materials like reduced graphene oxide (rGO), chitosan, cellulose, and magnetic nanoparticles to enhance capacity, selectivity, and stability. Mechanistic insights into Pb<sup>2+</sup> adsorption reveal that both chemisorption and physisorption processes contribute to effective lead removal, particularly through tailored MOF structures with specific ligands and metal nodes. Recent advancements include the development of portable, point-of-care devices based on MOFs, enabling rapid, on-site detection and analysis of Pb<sup>2+</sup> contamination. MOF-based systems thus hold significant potential as practical tools for addressing lead pollution in water, combining sensitivity, selectivity, and scalability in diverse environmental settings.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101057"},"PeriodicalIF":7.1,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Waseem, Nayef Ghasem, Mohamed Al-Marzouqi
{"title":"Advances in hollow fiber membrane contactors for CO2 stripping","authors":"Muhammad Waseem, Nayef Ghasem, Mohamed Al-Marzouqi","doi":"10.1016/j.mtsust.2024.101056","DOIUrl":"10.1016/j.mtsust.2024.101056","url":null,"abstract":"<div><div>Alkanolamines are most commonly used solvents for CO<sub>2</sub> capture because of their high absorption capacities and reversibility. The energy-intensive nature of amine-based CO<sub>2</sub> capture, as well as high capital cost, inhibits its widespread application. Amine solvent regeneration accounts for more than 60% of the overall CO<sub>2</sub> capturing cost. Global interest in reducing CO<sub>2</sub> emissions efficiently shows the urgency of advancements in carbon capture. Hollow fiber membrane contactors (HFMCs) give a promising option for solvent regeneration, offering benefits like functional adaptability, versatility, and decreased energy utilization. The latest developments in the use of HFMCs for CO<sub>2</sub> stripping in amine-based carbon capture processes are examined in this paper. The review includes an assessment of membrane materials, fabrication approaches, module developments, and innovation challenges. The challenges of scaling up membrane contactors for industrial applications are considered, emphasizing interdisciplinary collaboration, technological advancement, and environmentally friendly methods. Membrane contractors have the potential to significantly contribute to global efforts for a sustainable and environmentally conscious future as the world moves toward a low-carbon future. Further research on optimizing HFMC materials and understanding their industrial effect is essential to fully realize their potential in large-scale CO<sub>2</sub> separation processes.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101056"},"PeriodicalIF":7.1,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jingbo Hu , Yilin Zhao , Fangwei Liu , Xutao Chen , Liping Xiao , Shihui Zou , Jie Fan
{"title":"Low-temperature oxidative coupling of methane: A review","authors":"Jingbo Hu , Yilin Zhao , Fangwei Liu , Xutao Chen , Liping Xiao , Shihui Zou , Jie Fan","doi":"10.1016/j.mtsust.2024.101053","DOIUrl":"10.1016/j.mtsust.2024.101053","url":null,"abstract":"<div><div>The oxidative coupling of methane (OCM) has garnered significant interest as an effective technology for the direct upgrading of methane. However, the associated high temperatures and over-oxidation of the desired products have limited its large-scale application. This article reviews current strategies for low-temperature OCM reactions (T ≤ 700 °C), including the promotion of ·CH<sub>3</sub> generation, the introduction of surface coupling of ·CH<sub>3</sub>, and other engineering approaches. The summary outlines pertinent strategies and challenges that are anticipated to inspire future research in the design of low-temperature OCM catalysts.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101053"},"PeriodicalIF":7.1,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}